1 files changed, 35 insertions, 0 deletions
diff --git a/src/installer/corehost/cli/apphost/bundle/file_entry.cpp b/src/installer/corehost/cli/apphost/bundle/file_entry.cpp
new file mode 100644
index 00000000000..ba4b235fa93
--- /dev/null
+++ b/src/installer/corehost/cli/apphost/bundle/file_entry.cpp
@@ -0,0 +1,35 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+#include "file_entry.h"
+#include "trace.h"
+#include "dir_utils.h"
+#include "error_codes.h"
+
+using namespace bundle;
+
+bool file_entry_t::is_valid() const
+{
+    return m_offset > 0 && m_size >= 0 &&
+        static_cast<file_type_t>(m_type) < file_type_t::__last;
+}
+
+file_entry_t file_entry_t::read(reader_t &reader)
+{
+    // First read the fixed-sized portion of file-entry
+    const file_entry_fixed_t* fixed_data = reinterpret_cast<const file_entry_fixed_t*>(reader.read_direct(sizeof(file_entry_fixed_t)));
+    file_entry_t entry(fixed_data);
+
+    if (!entry.is_valid())
+    {
+        trace::error(_X("Failure processing application bundle; possible file corruption."));
+        trace::error(_X("Invalid FileEntry detected."));
+        throw StatusCode::BundleExtractionFailure;
+    }
+
+    reader.read_path_string(entry.m_relative_path);
+    dir_utils_t::fixup_path_separator(entry.m_relative_path);
+
+    return entry;
+}